Paperback. Condizione: Very Good. 1st edition. Ham Radio Magazine May 1978. J Jay O'Brien W6GDO, FM Editor. Published by Communications Technology Inc, Greenville, NH, 1978. Monthly Edition. Paperback. No DJ. Size 8vo (up to 9-1/2'' tall). Condition: Nr Fine. 128 Pgs. 6th annual antenna issue. Log-periodic design. Phased vertical array. Open-grid parabolic reflectors. Shunt fed verticals. Simple impedance measurements. Illustrated. Description text copyright 2011 BooksForComfort. Item ID 24370. book.